import java.util.Scanner;

public class text {

    public static void main(String[] args) {
        int a = 0;
        Scanner scanner = new Scanner(System.in);
        a = scanner.nextInt();
        System.out.print("该数的逆序数是：");
        for (int i = 0; i < 2; i++) {
            System.out.print(a%10);
            a /=10;
        }

    }


}
